It's actually 31 days. If you look at the charts for the past several years, the time to sell for that purpose was nov-dec and buy back in after ces has it's negative effect. If you haven't been around for more than 6 months, may not know this. I am not saying that's what I'm doing, but I laughed in my accountants face for the past 2 yrs about selling for a loss. Sure wish I had listened now.